Well tool



Jan. 1, 1946.

D. B. HOOSER WELL TOOL I Filed July 15, 1942 INVENTOR. DONALD 5 HOOJZR Patented Jan. 1, 1 946 4 UNITED STATES. PATEN 1 OFFICE WELL TOOL Donald B. Hooser, Dallas, Tex., assignor to Thv Guiberson Corporation, Dallas, Tex., a corporation of Delaware Application July 15, 1942, Serial No. 451,013

10 Claims.

vided with means to hold the locking members inwardly or against the mandrel when the mandrel is being inserted within the tubing. When the mandrel is raised slightly relative to the locking members, the said locking members are released so that spring arms will move the locking members outwardly so that they will seat within the next tubing joint which they engage,

Another novel feature is the provision of a backing or holding surface on the mandrel to hold the locking means in engagement with the tubing joint.

Another novel feature is the provision of a shoulder at the lower end of the backing member to absolutely prevent the mandrel and its associated parts being raised by the pressures of the well.

Other objects and advantages of the invention will appear in the detailed specification and claims which follow.

In the drawing in which I have shown the preferred'form of the invention by way of illustration,

Figure 1 shows the relative position of the parts when the tool is being run into the well, the figure being cross-sectional in part,

Figure 2 is an elevational view, partly in crosssection, with a choke set in the tubing and with the running in tool removed, and

Figure 3 is an elevational view, partly in crosssection, showing the retrieving tool attached to the choke and with the parts being shown in their relative positions with the choke ready to be removed.

It is common to have well tubing I provided with coupling collars 2 so that there is a space between successive sections of the tubing, thereby forming an internal annular recess 3 between the adjacent tubing sections having a diameter greater than the diameter of the tubing I. I propose to utilize this recess for the reception of locking members, as will hereinafter be described.

A conventional wire line 4 has secured thereto a socket member 5 to which is secured a member 6 having a cone surface 1 near the lower end thereof. The member 6 has secured thereto a collar 8 from which depend spring fingers 9 having a catch III at the lower end of each of the fingers 9. These parts constitute the running in tool.

A mandrel II is provided with a shoulder. I! which overlies the catches II) when the device is being run into the tubing, as is shown in Figure 1. It will be noted in this figure that the lower end of the member 6 contacts the upper end of the mandrel II. The mandrel II is also provided with a downwardly extending flange I3 providing a channel I4 in which is initially seated an upwardly extending locking finger I5 01' a locking member I6 to retain the locking member in retracted position. The inner circumference of the channel I4 extends downwardly forming a reduced circular wall Il having a cam shoulder I8 at the lower end thereof. Below the shoulder I8 is an intermediate circular wall I9 having a greater diameter than that of the circular wall I! and forming a backing wall for the locking member when the parts are in the position shown in Fig. 2, and at the lower end of the wall I9 is a shoulder 20. Extending below the shoulder 20 is an enlarged circular wall 2| terminating in a shoulder 22, against which rests a downwardly extending thimble 23 for the reception of a packer cup 24. As this type of packer cup is well known, a detailed description thereof is unnecessary. At the lower end of the mandrel is a collar 25 to which is secured a choke bean 26.

As is well known in the art, the choke bean has a smaller internal diameter than the internal diameter of the mandrel, so as to reduce the upward flow of fluid which passes upwardly through the mandrel and. outwardly through the hole 21.

A collar 28 is slidable on the upper portion of the mandrel and is connected to a cage 29 having spring arms 30 depending therefrom, and which sprin arms are connected at their lower ends to the various locking members I6.

The locking members I5 are of a sufiicient thickness to substantially occupy the space bea tween the reduced wall I! and the inner surface of the tubing, and the spring arms 30 tend to push the locking member I6 outwardly. of course, this tendency is restrained somewhat when the choke is being-run into the tubing because the finger I5 of each of the locking members is held against material outward movement radially by means of the flange I3 but not to the extent to prevent the outer surfaces of the looking members from dragging against the tubing. The parts would be in the position as shown in Figure 1 while the choke is being lowered in the tubing, and the locking member I6 could not be moved outwardly into the internal annular recess higher the well ered, the well fluid would by-pass upwardly through the choke bean, through the mandrel and outwardly through the hole 21, when the operator desired to set the device,

he would raise the wire line 4 'slightly,"thereby raising. the mandrel l I vThe locking member 16- would tend to drag against .the inner suriace or the tubing because of the spring arms would release the fingers [5 of the locking memher It from the flange l3, so that-thespring arms could-now move the into the internal annular recess trievable bottom hole flciently so that the I v I jacent one of the tubular joints. Continued up;

ward movement of the m'andrel would move'the backing wall I! behind the locking memberss that the locking members would have the wall.

and further, thelocking 'member would be seated on the shoulder 2ll, as

It would now be "impossi' ble to move the mandrel to a higher. position,and the spring fingers 9 would yield so that the catches is as a backing member,

is shown in Figure 2.

the shoulder l2, and .1. 9

l0 would be released from the wire line carrying the members and I0 could be removed from the well. The retrievable bottom hole choke is now positioned in the well. A reduced amount of well fluid could pass upwardly through the choke been 23 and through the mandrel, but the well fluid could not pass upwardly around pressures the more the packer cup 24 would be expanded, and the tighter would be the seal between the mandrel and the tubing. These upward pressures would-tend to move the mandrel upwardly, but the mandrel is positively locked in the position shown in Figure 2.

when it is desired to remove or retrieve the well tool, a retrieving tool is employed which is shown in Figure 3. This retrieving tool is lowered into the tubing by the wire line '4 and carries a cone member 3| provided with a cone surface 32. The cone member 3| is provided with a collar 33, and a shear pin 34 connects the collar 33 to the cone member 3l.- The collar 33 is provided with depending spring fingers 33 which at their lower ends are provided with catches 38.

when it is desired to remove the tool from -the well, theretrieving tool is run in, and the lower portion of the cone'member 3| engages the upper end of-the mandrel ll pushing it downwardly so that the backing wall l3 no longer restrains the locking member Hi from being moved inwardly, that is, it moves the mandrel downwardly so that the reduced wall I! is adjacent the inner ends of the locking member 16, as is shown in Figure 3. The spring fingers yield so as to permit the catches 36 to-ride downwardly over the upper surface of the collar 23 so-that the catches 36 engage the shoulder 31. when the wire is now pulled upwardly, the member" raises the collar 33 by means of the shear pins 34, and the spring fingers 33 raise the collar and locking member H. No upward'motion has as yet beenimparted to-the mandrel; The I locking members 3when" the rechoke had been raised suilocking members lswere ad-fthe mandrel because the outwardly thereby releasing tool including a mandrel, a

.tua'lly locked in the "thespeciflc form herein by way of illustration, and I desire to. jclaimthe invention broadly except as Imay limit nmyseli in the It is conceivable that the device might be virtubing due to sand or other causes. A predetermined strain on the wire line 4 would in such a case cause the shear pins 34 to shear. The cone member 3| would now be raised with the wire line-while the collar 33 would remain stationary until the cone surface 32 engaged the spring fingers 35 and moved them v the catches 36 from the-shoulder 31 'so that the retrieving tool could be raisedto the surface without rupturing the wire line. 1

I realize that many changes may be made in of the invention as shown appended claims.

Having now described myinvention, I claim: 1. A .well toolot the type to be lowered by a running-in device into a well tubing having an internal annular recess at the tubing joints, said locking member slidable on the mandrel and adapted to drag against tubing, .said looking 40 into a welltubing having mandrel having a stepped exterior forming a rebers are backed by carried by the mandrel the inner wall of iorming parts of the mandrel and member to prevent the locking member from moving into any recess as the tool is being lowered into the member being released from to the locking member, spring means to project said locking member into said recess when the locking member has been released from the man-v drel and the tool is raised so that the locking member is adjacent a recess and a shoulder carried by the mandrel to engage the locking member to prevent further upward movement of the locking member after it is locked in said recess.

2. A well tool of the type adapted to be lowered an internal annular re- Joints, said tool including a cess at the tubing duced, intermediate and, enlarged circular walls, a, shoulder between the intermediate and enlarged walls, a downwardly extending flange and overhanging the upper portion of the reduced circular wall, a collar slidableon the mandrel, spring arms carried by said collar, locking members carried by said arms, said locking members tending fingers adapted to be received within the flange when thelocking members are in their uppermost position relative to the mandrel, the spring arms causing the locking members to drag against the inner. surface of the tubing as the well tool is moved in the tubing, but the flange and fingers limiting the outward movement of the locking members, said locking members tending to remain stationary relative to the tubing when the mandrel is raised so that as the mandrel is raised, the flange moves above the fingers or the locking members while the locking memthe reduced wall, but the locking members are iree to be projected by the spring arms into the first recess encountered,

said mandrel being movable upwardly after the locking members are seated in said recess a limited distance equal to the height of said intermediate wall, said intermediate wall serving as a means to lock the locking members in said recess and said shoulder .engaging said locking members preventing further upward movement of said mandrel;

3. A well tool or the type adapted to be lowered by a running-in device into a well tubing havin the tubingwhen the tool is being raisedorlowered, means initially engaged having upwardly exan internal annular recess at the tubing joints,

said tool including a mandrel, a depending flange, said mandrel including an external circular wall .behind and extending below :said flange and an external backing wall below and of greater diameter than the circular wall, a collar slidable on the mandrel, spring arms carried by said collar, 9, locking member carried by each of said spring arms and having a locking finger adapted to be received within the depending flange of the mandrel when the mandrel is be ing run into the tubing, said mandrel moving 7 upwardly relative to said collar, arms and locking mandrel is raised sufficiently to position the said backing wall behind said locking members.

4; A well tool 01 the type adapted to be lowered by a running-in device into a well tubing having an internal annular recess at the tubing joints, said tool including a mandrel, a collar slidable on said mandrel, locking members, spring arms carried by said collar and supporting said locking members and tending to urge them outwardly away from the mandrel, means carried by said mandrel and locking members to hold' said locking members against outward movement but releasable upon upward movement of'the mandrel relative to the locking members, .said spring arms moving said locking members into the first tubing recess which is reached as the mandrel is raised after said means -is}released,' and a backing wall forming a part of the mandrel to prevent the locking members from'gmovdrel against further upward movemen 5. A well tool of the type adapted to be lowered by a running-in device into a well tubing having an internal annular recess at th tubing joints, said tool including a mandrel, said mandrel being provided with a depending flange, and outer surfaces of relatively reduced, intermediate and enlarged diametera'said intermediate surface forming a backing wall, locking means having an upstanding finger adapted to b received within the flange when the mandrel is being lowered and the locking means is adjacent the reduced outer surface of the mandrel, spring means tending to urge said locking means outwardly from said mandrel, said locking means being released from the flange when the man- :drel is raised relative to the locking means so as to permit the spring means tosnap the locking means into a tubing recess as th mandrel is raised, the intermediate backing wall moving upwardly behind the-locking means when the mandrel is further raised to lock the locking means in the tubing recess and a shoulder between the intermediate and the enlarged outer surface by engaging with the locking means preventing any further upward movement of the mandrel.

6. A well tool of the type adapted to be lowered by a running-in device into a well tubing having an internal annular recess at the tubing joints, said tool including a mandrel, a collar slidable on the mandrel, locking members, springs interconnecting the collar and locking members and tending to move thelocking' members outwardly, means whereby the locking membersare locked against or released from the mandrel, said springs moving the locking members into-the tubing joint recess as the mandrel is pulled upwardly by the setting tool, a backing wall carried bythe mandrel and positioned behind the locking members when the mandrel is elevated after the locking members have been set in the recess to prevent the locking members from being retracted out of said recess. 1

7. A well tool of the type adapted to be lowered .by a running-in device into a well tubing having an internal annular recess at the. tubing joints, said tool including a mandrel having an external circular wall and an external backing wall below and or greater diameter than the circular walls with a cam shoulder between said walls, a cage slidable on the mandrel, spring arms depending from said cage, locking members carried by said spring arms, means forming parts of the mandrel and the locking members whereby said locking members initially interengaged are retained adjacent the circular wall and above the shoulder until the mandrel is moved upwardly relative to the cage when they are disengaged, said shoulder serving as a means to move the locking members upwardly with the mandrel until the locking members ar raised suiliciently high so that the spring arms can project th'elocking members into a tubing joint recess so that the backing wall can then be moved behind the locking members to lock the said members in the tubing joint recess, and

means to prevent further upward movement of' the mandrel.

'8. A well tool or the type adapted to be lowered by a running-in device into a well tubing having an internal annular recess at the tubing joints, said tool including a mandrel having an external circular wall and an external backing ing out of the tubing joint and locking the man wall below and of greater diameter than the circular wall with a cam v shoulder between said walls, a cage slidable on the mandrel, spring arms depending from said cage, locking members carried by said spring arms, means forming parts of the mandrel and the locking members whereby said locking members initially interengaged are retained adjacentthe circular wall and above the shoulder until the mandrel is moved upwardly relativ to the cage when they are disengaged, said shoulder serving as a means to move the locking members upwarly with the mandrel until the locking members are raised sufliciently high so that the spring arms can project, the locking members into a tubing joint recess so that the backing wall can then be moved behind the locking members to lock the said members in the tubing joint recess, and a shoulder to prevent further upward movement of th mandrel.

9. A 'well tool of the type adapted .to be lowered by a running-in device into a well tubing having an internal annular recess at the tubing joints,.said tool including-a mandrel having an external circular wall and an external backing wall below and of greater diameter than the circular wall with a cam shoulder between said walls, a cage slidable on the mandrel, spring arms depending from said cage, locking members carried by said sp ing arms, means forming parts of the mandrel and the locking members whereby said locking members initially interengaged are retained adjacent the circular wall and above project the shoulder until the mandrel is moved upwardly relativeto the case when they are disrecess so that, the backing wall can then be .moved behind the locking members to lock the said members in the tubing joint recess, and a- .shoulder on the mandrel below the backing wall to-engage the locking members to prevent further upward movement oi the mandrel.

-10. A well tool oi the type adapted to be lowered by a running-in device into a well tubinz having an internal annular recess at the tubing y from the joints, said tool including a mandrel having an external circular wall and an external backing waiibelow and. or greater diameter than the circular wall with a cam shoulder between said.

walls, a cage slidable on the mandrel, spring arms depending from said cage, locking members car- 'ried by said spring arms, means rorming parts of the mandrel and the locking members whereby said locking members initially interengaged are retained adiacent the circular wall and above the shoulder until the mandrel is moved upwardlyrelative to the case when they are disengaged, said spring arms serving'as a means to tend to move said locking members outwardly nomm 3. Boom;

Disclaimer 2,392,244.D0nald B. Hooser, Dallas, Tex. WELL TOOL. Patent dated Jan. 1,

1946. Disclaimer filed Oct. 31, 1947, by the assignee, 17w Guiberson 00rporatzon.

Hereby enters this disclaimer to claim 6 in the said specification.

[Oflicz'al Gazette December 9, 1.947.] 

